package chapter03.example03;
class Student{
    String name;
    int age;
    void read(){
        System.out.println("大家好，我是"+name+"，年龄"+age);
    }
}
public class example03 {
    public static void main(String[] args) {
        Student stu=new Student();
        stu.name="张三";
        stu.age=-18;
        stu.read();
    }
}
